me again.... What is the difference between a 750VA and a Pro 500UC? I'm sure they can help me at CompUSA but everytime I've been in there - well.... they aren't the brightest bulbs on the tree So I would like to know going in what I need to look at. So, thanks for all the help you've given me in the other thread. There's also a UPS that is a UPS Pro 500 with a USB port with 7 outlets. Right now I only have 3 things plugged into the "monster." Cindy P.S. Whenever I run the bounce sheet over the computer when I first wake it up, there is no "zapping" -- will the UPS help if this is some sort of static electricity?